Thermodynamics Application in Real-World Scenarios — Lesson 1

This lesson covers the application of thermodynamics in real-world scenarios. It discusses the process of heating liquid water in an insulated chamber by mixing it with saturated steam. The lesson explains how to calculate the temperature of the saturated steam, the exergy destruction during the mixing process, and the second efficiency. It also discusses the concept of entropy balance and how to calculate the rate of exergy change. The lesson uses illustrative examples such as a chilling unit cooling a commodity and a heat exchanger preheating air to explain these concepts.

Video Highlights

01:31 - Discussion on the configuration and flow rates of the system
14:44 - Calculation of the incoming and outgoing availability or exergy and the irreversibility during the process
24:11 - Calculation of the rate of heat interaction and the rate of exergy change during the chilling process

Key Takeaways

- The first law of thermodynamics, also known as the law of energy conservation, is used to determine the temperature of the saturated steam in the insulated chamber.
- The second law of thermodynamics is used to calculate the irreversibility and second law efficiency in the mixing process.
- In the cooling of a hot gas mixture, the incoming and outgoing exergy are calculated using the first law of thermodynamics.
- In the chilling unit scenario, the rate of heat interaction and the rate of exergy change are calculated using the first law of thermodynamics and the concept of entropy balance.